Bobbin-turning machine.



w. 0. FARNUM.

BOBBIN TURNING MAGHINE.

APPLICATION FILED MAR. 29. 1911.

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COLUMBIA PLANOORAPH w" WASHINGTON. n. c.--

W. G. FARNUM.

BOBBIN TURNING MACHINE.

'APPLIOATION FILED MAR.29, 1911.

Patented Sept. 10, 1912.

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- W. G. PARNUM.

BOBBIN TURNING MACHINE.

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Inventor.

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COLUMBIA PLANOURAPH 60., WASHINGTON. D. c.

W. G. FARNUM.

BOBBIE TURNING MACHINE.

APPLIOATION FILED 111111.29, 1911.

Patented Se t. 10,1912.

8 SHEETS-SHEET 6.

COLUMBIA PLANDURAPH co., WASHINGTON, D. c

W. C. FARNUM. BOBBIN TURNING MACHINE.

APPLICATION FILED Mu e. 1911.

Patented Sept. 10, 1912.

3 SHEETS-SHEET 6.

witnesses.-

COLUMBIA PLANOGRAPH co., WASHINGTON, n. c.

W. e. PARNUM.

BOBBIN TURNING MAGHINE.

APPLICATION FILED MAR. 29, 1911.

Patented Sept. 10, 1912.

COLUMBIA PLANOGRAPH c0., WASHINGTON, n. c.

W. G. PARNUM.

BOBBIN TURNING MACHINE.

APPLICATION FILED MAR. 29, 1911. 1,033,499, I Patented Sept. 10,1912.

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s'rarns PA'rENT OFFICE- WILLIAM C. FARNUM, OF FITCHBURG;MASSACHUSETTS, ASSIGNOR TO U. S. BOBBIN & SHUTTLE COMPANY, OF PROVIDENCE, RHODE ISLAND, A CORPORATION OF NEW JERSEY.

BOBBIN-TURNING MACHINE.

1" 0 all whom it may concern Be it known that I, /VILLIAM C. FARNUM, a citizen of the United States, residing at Fitchburg, in the county of lVorcester and State of Massachusetts, have invented an Improvement in Bobbin-Turning Machines, of which the following description, in con nection with the accompanyingdrawings, is a specification, like letters on the drawings representing like parts.

The invention to be hereinafter described relates to bobbin turning machines and more amount of stock. This manner of operation,

however, places such strain upon the wooden blank that the latter is often split, cracked, or otherwise rendered unfit for further service; and especially is this apparent when the bobbin blank is eccentrically bored. Moreover, with the class of machines noted, the operations are necessarily slow, with a con sequent small output.

WVith these generally stated facts in view the present invention aims to produce a bob bin turning machine wherein the bobbin blank shall be so treated that the above objections and others heretofore present in automatic machines of this type shall be overcome, and wherein the parts and their association shall be such that bobbin blanks may be accurately and uniformly turned to the desired shape ofthe finished bobbin without danger of injury, and wherein also the output and economy of operation shall be increased. These general objects and others of the present invention will best be made clear by the following description and accompanying drawings of one form of means for carrying the invention into practical effect, it being understood, of course, that such form of means is only one of the many that might be devised to embody the actual Specification of Letters Patent.

Application filed March 29,. 1911.

Patented Sept. 10, 1912.

Serial No. 617,669.

invention which is defined in .true scope by the claims. I

In the drawings :-Figure 1 is a side view of one end of a machine embodying the present invention and looking in the direction of the arrow in Fig. 5; Fig. 2 is a like view of the other end of the same machine, the two views when placed end to end showmg the entire machine; Fig. 3 is a longitudlnal section of one of the gouge rocker frames and associated parts, on the line a 33, Fig. 5; Fig. 4 is an end elevation looking from the left, Fig. 1; Fig. 5 is a section on the line 5-5, Fig.2, showing the bank of gouges, the trunnion frame, its back or finishing knife, and associated parts on an enlarged scale; F 1g. 6 1s a sectlon on the broken line 6-6, Fig. 5, wlth the finishing knife and trunnion frame shown in plan view; Fig. 7 is a section on the tail stock center for engaging one end of the bobbin blank; Fig. 8 is a section on the line 8-8,

,Fig. 2, showing on an enlarged scale the location of the tail stock slides, the cam, and cam levers for reciprocating the slides;

Fig. 9 is a section taken on the line 9-9,

Fig. 6, showing the construction of trunnion frame, back knife block and bracket with associated part-s; Fig. 10 is a section on the line l010, Fig. 1, showing the adjusting device for the gouge oscillating or lifting levers; Fig. 11 is a section on the line 1111, Fig. 1, illustrating the gouge oscillating or lifting cams and cam levers; Fig. 12 is a fvertical longitudinal section of the left end of the machine showing more clearly the de- :tails and relation of parts; Fig. 13 is a longitudinal section at the left end of the machine on line 1318, Fig. 8; Fig. 14 is a detail section of the tail stock spindle looking cam, taken on-the line 14-14, Fig. 6;

Fig. 15 is a sectional detail of the tail stock spindle locking device on line 15-15, Fig.

6; and Fig. 16 is a longitudinal section .througha finished bobbin with lines reprejsenting the successive cuts made at each traverse of the gouges and the finishing cut :of the. back knife.

It is one of the purposes of the resent invention to form the bobbin by sulnecting the bobbin blank to a series of separate gouging or cutting operations progressively from end to end, sothatat any one time only one gouge or cutter may be acting upon the blank, fwith the result that injury to the blank is avoided and any eccentricity between the bore and exterior of the blank is cured as will later appear.

It will conduce to a better understanding of the invention and its characteristics to outline in a general way the action of the machine as a whole and to then describe in detail the various parts and their operative relation.

A series, preferably four as shown, of head and tail stock spindles are arranged to support a like number of blanks to be turned, and a similar number of gouges, one to act on each blank, are disposed in proper relation to the co-acting head and tail stock spindles, so that as each gouge is fed longitudinally of the adjacent blank it will remove therefrom a layer of material. A cam device determines the amount each gouge shall cut from the blank at each traverse l is the axis of the main driving shaft 4.

to'reduce the blank to proper dimension for the action of the back or finishing knife, which is so disposed that after each bobbin blank has been cut by its adjacent gouge to the proper dimension, the gouge will be l 13 are mounted for longitudinal movement :in the bearings 14 contained within the :tail stock quills 15 and inclosed by the tail .stock cap 16 which serves to maintain the tail stock spindles 13 in suitable position on ithe bearing casing 17, Fig. 6, alined with their cooperating head stock spindles, and like said head stock spindles arranged in lthe same circular arc. of the head stock center 19, Fig. 6, is adaptied to fit the conical bore at the base of the bobbin blank, while the head stock spur 20 engages the base of the bobbin blank to insure rotation thereof. @stock center 21, Fig. 6, has a part 22, Fig. "7, provided with a pin 23 to engage the bore ;of the bobbin blank at the tip end, while ;the circular edge 24 may engage the wood at lthe end of the bobbin blank, all as will be ,clearly apparent to those skilled in the art, so that a bobbin blank B placed between the head and tail stock centers will be caused to rotate rapidly through the described conswung away from the blank and the back or finishing knife will be automatically positioned to act upon and finish the bobbin. To secure this characteristic action the head and tail stock spindles and the gouges are preferably arranged in an arc, the center of which is the axis about which the back knife may swing to position it opposite any one of the bobbin blanks.

When the back knife has acted, it is dropped or moved directly away from the finished bobbin and then withdrawn, and the tail stock spindle is moved endwise to release the finished product. During the turning of the blank and action of gouges and back knife the normally spring pressed tail stocks are locked, as will later appear, and when the back knife has finished a bobbin its particular tail stock is unlocked and withdrawn.

With this general view of the machine action, the following description of one form .of means for carrying the invention into practice will be readily understood by those skilled in the art. The machine frame 1 may be of any appropriate or desired size and character to sustain the machine parts, and, as shown, comprises an elongated base portion, Figs. 1 and 2, having sides rising therefrom, at the upper part of which they support a series of bearings, which will be and purpose it is desirable that the gouges perform their cutting operations accurately more fully described. Mounted in bearings 2 and3 secured to the main frame is the main driving shaft 4, said bearings 2 and 3 being preferably formed as circular casings fixed to the machine frame, as indicated in Fig. 12. To the main driving shaft 4 is secured the driving pulley 5, Figs. 1 and 12, driven in suitable manner, as by the belt 6, leading from a line shaft or other suitable source of power. Secured to the main driving shaft is the master gear 7, Figs. 5 and 6, which is preferably contained within the casing of bearing 3, and engaged with said master gear are the pinions 8, Figs. 5 and 6, one for each of a series of head stock spindles 9 mounted to turn in suitable bearings 10 within the head stock quills 11, said quills, and, perforce, the head stock spindles,

,being arranged. in the arc of a circle about the bearing casing 3 and retained in place by suitable means as the head stock cap 12,

:Figs. 5 and 6.

From the construction thus far described, it will be seen that the head stock spindles are driven from the main driving shaft through the master gear 7, and are rotated at high speed, and it will likewise be apparent that the said spindles are arranged in a circular arc, the center of which Disposed in longitudinal alinement with the head stock and spindles is the tail stock ;and a similar series of tail stock spindles.

Referring to Fig. 6, the tail stock spindles The conical end 18 Similarly, the tail nections with the main driving shaft 4.

is a series of gouges and their adjuncts, which will now be descrlbed.

In a machine of this general character and uniformly without liability of being defiected from their position while moving longitudinally of the blank. For these and other reasons, thegouge beds 27 are formed of an unyielding nature, and to secure the best results are preferably formed of generally circular cross-section, as indicated in Fig. 5, though obviously this may be varied. Secured to the end portions of the gouge beds, see Fig. 3, are the gouge bed extensions 28 and 29, one extending from each end, and preferably screw threaded thereto, as it 30. Obviously, any suitable form of securing the gouge beds to their extensions may be adopted.

The gouge bed extensions project through and are supported by suitable bearings circularly arranged upon the machine frame. In the present form of the invention, these bearings 25 and 26, Figs. 1, 2 and 3, one at each side of the gouge bed, support the gouge beds in circular series outside of and adjacent to the head and tail stock spindles, as will be seen from Fig. 5.

The edge portions of the gouge beds, Fig. 5, are formed to support the gouge carriages, one for each bed, and in the form of the invention illustrated, the edge portions 31 of the beds are flared outwardly or beveled, Fig. 5, to engage complemental ways in the gouge carriages 32, whereby said carriages may slide longitudinally along the beds and yet be firmly held in unyielding relation thereto. One of the ways in the gouge carriages 32 may be formed by a piece 33 hold in place by suitable screws,

34, 34, by which the carriage can be readily removed from its bed when desired or any wear be readily taken up.

It will be seen from the construction thus far described that while the gouge carriages 32 may slide longitudinally of their beds, they are constrained to partake of any turning or rotary movement thereof, such rotary or turning movement being herein provided for the purpose of properly positioning the gouges toward and from the work to remove from the blank the desired amount of material at each traverse of the gouge longitudinally of the blank, and to enable the gouge that has performed the last operation prior to the action of the back or finishing knife to be lifted clear of the work during the action of said knife. The form of means to this end may vary within the true scope of the invention, but a suitable character of means for this purpose will now be explained.

The bed extensions 28, Figs. 1 and 3, are projected throughbearings 35 adjacent the end port-ions thereof and outside of said bearings toward the ends of the extensions are the gouge lifting arms 36, Figs. 1 and 11, clamped to the extensions by suitable means such as the clamp 37 and screws 38, Figs. 1, 10 and 11, said arms being adapted for operation by the gouge lifting cam, which as a whole maybe identified by the reference C, and the details whereof will be hereinafter described.

In order to swing the gouges toward the work, the extensions 29 have secured thereto one end of a spring 39, Fig. 3, by means of a pin 40, the other end of said spring being secured to an adjusting arbor 41 extended into a bearing 42 and secured in place by a set screw 43, Figs. 2 and 3, the construction being such that by proper adjustment of its torsional force, said spring will rock the gouge bed and gouge to move the latter toward the work, the amount of said movement being cont-rolled by the gouge lifting cam O and gouge lifting arms 36, in a manner to be now explained.

Mounted in suitable bearings 44 and 45, Fig. 12, and extending axially of the main shaft 4, is the cam shaft 46 having a pinion 47, Fig. 12, meshing with a smaller pinion .48 within the casing bearing 4-5, as clearly indicated in Fig. 12. Secured to the shaft 49 carrying the pinion 48 is a pinion 50, Fig. 12, in operative engagement with the pinion 51, fixed to the cam shaft driver 52, which extends longitudinally of the machine frame, as indicated in Figs. 1, 2 and 12.

3 Motion is imparted to the cam shaft driver 52 from the main driving shaft 4 by suitable connections, those indicated comprising a pinion 53 secured to the cam shaft driver 52 which is itself rotatable in suitable bearings 54, 55 and 56 extending from suitable supporting means. The pinion 53 meshes with a smaller pinion 57 mounted on the counter shaft- 58 and carrying a belt pulley 59, said belt pulley being driven by a suitable belt 60 from the main driving shaft 4,

as clearly indicated in Fig. 12. Fro-1n the construction described, it will be apparent that while the main driving shaft 4 rotates at high speed, the reduced driving connection between it and the cam shaft 46 causes the latter to rotate with comparatively slow speed. Obviously, the manner of driving the cam shaft 46 may be variously changed, but the described means has been found to be a convenient and good practical form of this feature of the invention.

Secured to the cam shaft 46 is the gouge lifting cam G which is conveniently formed of a series of cam sections each corresponding to and all adapted to operate the several gouge beds in order to properly position the gou'ges with relation to the bobbin blanks to successively perform their cutting action on the traverse movements longitudinally of the blank.

The sections of the cam C correspond in number to the number of gouge beds and each comprises a detachable member 61 which is secured to the cam member C by suitable bolts 62, Fig. 11. The cam sections 61 have the cam portions preferably arranged along their peripheries, as indicated in Fig. 11, so that they may be readily ground or altered in shape corresponding to the character or form of bobbin being turned. Obviously, also, the cam sections may be readily removed and replaced by others of different forms.

Pivotally mounted on the circular bearing 2, at 63, are the lifting arm actuators 64, each carrying a roll or pin 65 adapted to bear upon the periphery of the cam sections 61, Fig. 11. The cam actuators 64 are preferably arranged at equal distances apart around the bearing 2, and since the gouge lifting arms 36 with which they cooperate to lift the gouge beds and gouges are dis posed in a small arc, it follows that the actuators 64 are ofsomewhat different form in order to adapt them to impart to the gouge lifting arms the desired motion. For instance, the actuator 64, at the upper portion of Fig. 11, acts directly on the lifting'arm 36, whereas the actuator 64 at the left, Fig. 11, is connected to the lifting arm 36 by a rod 66. Similarly, the actuator 64 at the bottom, Fig. 11, is formed as a bell crank and has a link connection 67 with its lifting arm 36, while the actuator 64, to the right, Fig. 11, acts directly on this liftingarm 36.

From the construction described, it will be apparent that the spring 39, with which each gouge bed is provided, normally forces the gouge carrier 32 and its gouge toward the work,and that the gouge lifting arms 36 in connection with their respective actuators 64 define the position of the gouge with respect to the work as defined by the particular cam section operating upon each of the actuators 64.

As hereinbefore noted, the gouges are moved longitudinally of their respective beds during their cutting operation, and as a means for efi'ecting this movement of the gouges they are each provided with a rod 68, Fig. 3, which is preferably connected to the gouge carrier 32 by means of a screw thread 69 and set nut as indicated in Fig. 3, the opposite end of the said rods 68 being connected to a sliding frame 70, Fig. 1, which is adapted to move longitudinally of the machine on suitable guides 71. As one means of connecting the rods 68 to the sliding frame 70 each rod is or may be provided with a screw threaded end with appropriate nuts at each side of the flange of the said sliding frame 70, as indicated in Fig. 1. The frame 70 is connected by a rod 72 to a cam actuated lever 73, Fig. 1, pivotally mounted at 74 near the lower part of the machine frame and provided with a roll 7 5 which engages a cam groove 76 in a suitable cam 7 7 secured to the cam shaft 46, as will be obvious from Fig. 1. If desired, the rod 72, as well as the roll 75, may be adjustably connected to the cam lever 73 bypin and slot connection 78, 79, as indicated in Fig. 1, whereby without altering the cam 77 the traverse of the gouges may be adjusted to correspond to the length of cut desired in the formation of different sizes of bobbins.

It may be desirable at times to remove or disassemble the gouges and their carriers from one or more of the gouge beds, but as well known by those skilled in the art, it is difficult to properly adjust the gouges to their work and suchadjustment requires care and experimental. trial. To avoidthis condition the gouge bed extension 28, adjacent the clamps 37 are provided with a pin 80, Fig. 10, and the clamp 37 for connecting the lifter arms 36 to the extensions is provided with a set screw 81, which may be set in position so that in reassembling the parts it is only necessary to bring the end of the screw into contact with the fixed pin 80 on the extension to properly locate the lifter 36 with respect to its actuator 64. From the construction thus far described, it will be apparent that the present invention contemplates the simultaneous treatment of four bobbin blanks, three of these blanks being treated by their respective gouges while one is being finished by the back or finishing knife, as will presently appear. It will also be noted that owing to the character of the gouge lifting cam C and its several sections that each gouge will act upon a blank to remove therefrom a small portion of the material desired while the gouge traverses in one direction, and then an additional amount of material as it traverses in the opposite direction, the num ber of traverses of thegouges in the present embodiment of the invention causing them to treat the blanks six times. t the end of the sixth treatment when the bobbin blank has been turned to the proper dimension, it is desirable that it be finished, and the present invention contemplates a back or finishing kniie to act upon each of the bobbin banks immediately following its sixth treatment by its gouge. One means contemplated by the invention to this end will now be described.

Suitably mounted in the casing bearings and 17 Fig. 6, and disposed between the head and tail stocks are the supports 82, 82 of a back knife carrying frame, which, for ldentification, may be herein termed the trunnion frame, best shown in Figs. 5,6 and 9. The trunnion frame supports 82, 82 it will be noted are in axial alinement with the driving shaft 4, so that the trunnion frame carrying the back knife is mounted to swing about a center which is the center of the circles in which the head and tail stocks and the gouge beds are arranged, so that the back knife may be swung into position" to treat any one of the series of bobbin blanks after it has been properly reduced to shape by its gouge knife Means are also provided for causing the back knife to move its cutting position with respect to any of the bobbin blanks and after performing its cutting or finishing operation to drop directly therefrom and recede, the gouge knife of the blank being treated by the finishing or back knife being at such times removed from cutting position by a section of the gouge lifting cam C, as will presently appear.

The trunnion frame 83 carries a table 84 on which is mounted the knife carrier or slide 85, Fig. 9. The knife carrier or slide 85 is adapted to move over the table 84 toward and from the bobbin blanks and is provided with means for detachably holding the back knife. It is important in this class of machines that when the back or finishing knife has been properly assembled and adjusted for doing its work, it be not disturbed in this adjusted relation with the knife carrier or slide, and the present invention contemplates means whereby when the back knife or knives have been thus assembled they may be secured to the knife block and knife bracket in such a manner that the entire knife block and knife bracket and knives may be detached from the slide and stored away for subsequent use without at the same time disturbing the relation of parts whereby when a knife isreturned to its knife carrier or slide it will be in adjusted position for performing its intended function without further adjustment.

To the above ends, the knife carrier or slide 85 is provided with an undercut portion 86 which is adapted to be engaged by a complemental lip 87 on the knife bracket 88 to which the knife block 89 is secured by means of suitable bolts 90, Fig. 9. The knife block 89 is provided with a grooved way 91 in which fit the heads of suitable bolts 92 for securing the knives 93 to the blocks, and an adjusting screw 94 is provided for properly adjusting the knife blocks with relation to the knife bracket and maintaining the parts in proper adjusted position. It is essential that the inclination of the back knife or knives with respect to the knife carrier or slide 85 be fixed when once the knife or knives are adjusted to use and to this end an adjusting screw 95 is provided with an appropriate lock nut 96 whereby, the inclination of the knife or knives having been properly secured, the adjusting screw 95 may be clamped rigidly in position with its end adapted to bear upon the undercut surface of the knife carrier or slide 85.

From the construction thus far described, it will be noted that the knife or knives and the parts to which they are directly connected are self-contained, and the present invention contemplates means for adapting these parts to be secured and detached without adjustment to and from the knife carrier slide 85. To this end, a wedge block 97 is adapted to engage by its inclined face a complemental inclined face at the rear of the knife bracket, suitable set screws 98 being provided for forcing the wedge 97 into clamppresently appear.

ing position. It will thus be seen that when the knife or knives have been adjusted and the knife block and bracket properly secured to perform the intended work on the special form of bobbin required, such parts, without disturbing their assembled relation, may be disassociated from the knife carrier or slide 85 by simply loosening the bolts 98 and withdrawing the wedge, and, similarly, the parts may be again re-assembled by merely engaging the lip 87 of the knife bracket beneath the undercut 86 of the slide and forcing the wedge to place.

The knife or knives having been secured tothe knife slide or carrier 85, it becomes de sirable to position the knife to act upon a bobbin blank which has been finished so far its gouge is concerned, that is, that has been treated by the gouge a plural number of times, six in the present instance. In order to swing the trunnion frame, and, perforce, the knife or knives carried thereby into desired position, the arms 99, Figs. 6 and 9, of the trunnion frame have extending between them a rod 100, to which is swiveled by a universal joint 101 the upper end portion of a trunnion swinging rod 102, the lower end of said rod being similarly connected by a universal joint connection 103 to the horizontal arm 104 of a bell crank lever pivoted to the main frame at 105 and having its other arm 106 provided at its upper end with a cam roll 107 adapted to engage the cam groove 108 in the cam 109 secured to the cam shaft 46, Figs. 1 and 12. From this construction it will be noted that as the cam shaft 46 rotates, it will turn the trunnion frame in response to the character of the cam groove 108 in the cam 109, as will In order to counterbalance the trunnion frame and the bell crank lever for operating the same'a weight 110 is connected to the upper end of the arm 106 of the bcllcrank by means of a flexible connection 111, said connection passing over a guide roller 112 secured to the machine frame.

The trunnion frame having been swung by the means described into position to finish a blank already treated by a gouge, it becomes desirable to move the back knife for ward in order to provide the bobbin with the usual stepped construction as indicated in Fig. 6. To this end, there is pivotally mounted at 113, Fig. 6, abell crank 114, the end 115 of said bell crank being jointed by a link 116 to the knifecarrier or slide 85 at 117, Figs. 6 and 9, while the other arm of the bell crank is connected by a universal joint 118 to the end 119 of a link 120, Figs. 2 and 6, the other end of said link 120 being jointed to an actuating lever 121, Fig. 2 pivoted to the frame at 122 and having a roll 123 to engage the cam groove of a suitable cam 124 disposed at that end of the machine remote from the cam 109. The cam 124 is mounted upon a cam shaft- 125, Fig. 13, which is shitably mounted in bearings 126, 127 and 128, Fig; 13, rising from the machine frame. It will be noted that the cam shaft 125, Figs. 2 and 13, is in longitudinal axial alinement 132. Mounted on the shaft 133 carrying the pinion 130 is a pinion 134, Fig. 13, which meshes with a smaller pinion 135 on the cam shaft driver 52 which, as before stated, is driven slowly from the main driving shaft through the connections heretofore explained.

From the construction thus far described, it will be noted that while the trunnion frame may be swung by the means described to position the knife or knives for coaction with any one of the bobbin blanks, and can be moved toward and from the bobbin blank, it is desirable for accuracy of work that when the trunnion frame is positioned for the back knife operation upon a bobbin blank, it be steadied in such position so that the'backward and forward movement of the knife may accurately and uniformly perform the cutting operation, and as one means to this end the following construction is contemplated by the present invention.

Secured to the bearing casing 3 by suitable means such as thebolts 136, Fig. 6, is the bracket 137 which is positioned as inclicated in Fig. 5 opposite to the circular series of gouge beds. Mounted on the bracket 137 by means of bolts 138, or otherwise, is a directing plate 139, one of said directing plates being directed and positioned to guide the knife slide or carrier in its movement to- Ward any one of the series of bobbins disposed opposite thereto. The guide plate 139 is provided with a guide rest 140 and a guide lug 141, between which is a space 142 for the reception of a guide pin 143, Fig. 6, carried by a bracketarm 144 secured to the knife carrier or slide 85. The described construction is such that when the knife is withdrawn, or to the right, Fig. 5, and is swung into position with the pin 143 opposite the space 142 in a guide plate 139, the knife carrier or slide 85 may be moved forward 'or to the left, Fig. 5, to cause the knife or knives mounted thereon to engage with a blank or bobbin, the lu 143 at such times being guided between the part-s 140 and 141. When, however, the knife has made its inward movement and has formed the shoulder or steps in the bobbin, as indicated in Fig. 16, the pin 143 passes beyond or-to the, left, Fig.5, of the lug 141, whereupon the trunnion frame and, perforce, the knife or knives carried thereby, may have its rearward end swung upward with a corresponding downward movement of the knife away from the finished bobbin, and the knife be then withdrawn or moved to the right, Fig. 5, away from cutting position.

To insure uniform inward movement of the knife carrier or slide and knives to the same extent and to secure uniformity of product, the bracket 144 is provided with an arm 145 having a slot 146 which rides upon a pm 147 projecting from the trunnion frame, and preferably secured to one of the arms 99, as indicated in Fig. 6 by dotted lines, against which one end of a set screw 148 is adapted to contact when the knife carrier or slide has been moved by its actuating means to the inward limit of its movement.

' By this construction, in case of wear or any lost motion of the knife carrier or slide actuating means, the screw 148 insures that the knife or knives shall move uniformly and to the same extent during their cutting action.

It sometimes becomes desirable to alter the inclination of the guide plates 139 in order to insure a proper and uniform size of either the bobbin as a whole or either end thereof, and to this end the guide plates 139 are each provided-with adjusting screws 149, Fig. 5, which bear upon suitable lugs 150 projecting from the bracket 137. By

suitable adjustment of said screw, after loosening the screws 138, it will be apparent that proper inclination will be given to the guide plates and, perforce, a proper finishing cut to the bobbin be imparted.

From the construction thus far described as one form of the invention it will be noted that the series of gouges and their cooperating head and tail stock spindles for holding the blank to be treated are arranged in arcs of circles, the center of which is the axis of the trunnion frame carrying the back or finishing knife, and that said trunnion frame is swung about said axis to position the knife for treatment of any bobbin blank that has been reduced to the desired form and size by anyone of the gouges. It will also be noted that each gouge is caused to make a number of traverses back and forth in cutting the blank, six of such traverses being provided in the form of invention illustrated; and that the gouge lifting cam determines the depth of out each gouge shall make on anytraverse. When a gouge has traversed and cut the blank the allotted number of times, six in this instance, the highest riser of the. gouge lifting cam acts upon the gouge lifting arm of the gouge bed carrying said gouge and lifts said gouge away from the blank so that on its next traverse it will not .act upon the blank, as indicated in Fig. 5. At the same time, the trunnion frame is swung by its actuator to place the back knife opposite the said blank,

and then the back knife, suitably guided by one of the guide plates 139, is caused to advance and act upon the bobbin blank to form the usual shoulders and finish the same. During this action the adjacent gouge has traversed lengthwise of the bobbin blank but has been maintained in raised position by the highest riser on the gouge lifting cam, as already described, and when the back knife has performed its work and is in advanced position, with the lug or pin 1 13, Fig. 6, in front of the lug 141-1, Figs. 5 and 6, the trunnion frame is swung about its axis dropping the knife directly away from the' finished bobbin, whereupon it is drawn back by the means described, and the finished bobbin is released from the head and tail stock spindles, as will presently appear.

It is desirable for the best results that the several gouges shall successively and in regular order complete their treatment of the blanks, so that while the back knife is finishing one bobbin, the next adjacent blank is being completed for the next treatment by the back knife. By this arrangement it will be noted in the form of invention described that one gouge will always be treating a fresh blank; the next in sequence will be treating a blank already partially formed by it; the next will be finishing a blank; while the next in sequence will be raised into inoperative position, and its blank will be under treatment by the back knife. Thus at each complete traverse back and forth of the gouges not only will three of the blanks be cut by the gouges, but the back knife will finish a bobbin. This sequential act-ion upon the blanks to produce the finished bobbin is well illustrated in Fig. 16, wherein, the line a represents a cut made by a gouge in the fresh blank as the gouge traverses the full length of the blank; 5 represents the next cut formed as the gouge makes its return traverse; 0 represents the next out made by the gouge on its third trip; (Z likewise a cut made on the fourth trip; and c and f cuts made bythe gouge in its fifth and sixth trips. It will be seen that at each successive cut the gouge moves toward the axis of the blank under control of the gouge lifting cam, and that following the sixth cut by the gouge, the latter is raised to inoperative position, and the back knife performs its function to finish the bobbin and form the shoulders g and properly complete the base and round the trip of the bobbin.

The bobbin having been completed, it is desirable to remove it from the machine, and a suitable means to this end will now be described. As hereinbefore stated, the tail stock spindles 13 are longitudinally movable in their bearings, and at their ends remote from the tail stock center they are connected to suitable slide bars 151, Figs. 2 and 13, which slide in suitable bearings 152 and 153 secured to appropriate parts of the machine frame, as, for instance, the bearing casings of the cam shaft 125. The slide bars 151 receive motion from a cam 154 secured to the cam shaft 125, by means of suitable levers 155, Figs. 8 and 13, carrying rolls or pins 156 which engage the cam groove of the cam 15st. These levers 155 are pivoted to the machine frame equal distances apart, as at 157, Fig. 8, and their opposite ends are jointed to links 158 connected at 159 with the lugs 160 adjustably secured to the slide bars 151, substantially as indicated by Fig. 13.. Since the tail stock slides 151 are arranged about only a portion of a circle while the levers 155 are arranged pivotally about the entire circle for convenience of structure it follows that the levers will be of somewhat different shape or length,butobviously, this is not material.

It is desirable that the tail stock spindles shall not only be longitudinally movable as stated, in order to secure and release a bobbin blank, but that the blank be held yieldingly so that the tail stock spindle may accommodate itself to variations in length of bobbin blanks. Where, however, the tail stock center continues to press upon the end of the bobbin blank during the turning ac tion, it will tend to bore or burn into the end of the blank. To obviate this is one of the features of the invention which may be varried into effect by means such as the following. The tail stock spindles, Fig. 13, have a reduced end portion 161 which passes loosely through a lug 162 projecting from the appropriate tail stock slide 151, and having aheaded nut 163 on its end. Between the face of the lug 162 and a shoulder 164: on each of the tail stock spindles 13 is a spring 165, Figs. 2 and 13, normally acting to move the spindle to the left, Fig. 18. From this construction it will be noted that the tail stock spindles are yieldingly held with the centers in engagement with the end of the blank. To relieve the end of the blank from the constant pressure of the spring 165 during the turning operation, and thereby prevent boring or burning into the end of the blank, the invention contcmplates means for locking the tail stock spindles, and then unlocking them when a bobbin is to be released. One form of means to this end is as follows: Each tail stock spindle 13, Fig. 6, has loosely engaged therewith a locking toggle 166, which is held from endwise movement thereon by means of pins 167 projecting from the tail stock arbor 15, and at its lower end engages a'toggle operator or rod 168 having a. shoulder 169. A spring 170 acting upon the operator or rod 168 normallyholds the toggle in the position indicated by Fig. 6, with the tail stock spindle free to move longitudinally. Mounted on the end of each of the toggle operators or rods 168, there being one for each tail stock spindle, is a cam lug 171, Fig. 6, adapted to be engaged by a looking cam 172 secured to the cam shaft 125. Inasmuch as there are four tail stock spindles and four toggle operators, one for locking and unlocking each spindle, there are also four locking cams 172, one for each toggle operator. As shown in Fig. 14, each locking cam has a looking or cam portion for engaging the cam lug 171 on its cooperating toggle operator to move and hold it to the right, Fig. 6, to thereby cause the locking toggle 166 to bite upon and lock the tail stock spindle from endwise movement toward the bobbin block, and also an open portion 173, Fig. 14:, to permit the cam lug 171 to be released when its locking cam has been sufliciently rotated to thereby unlock the connected tail stock spindle.

From the construction described, it will be I noted that when the open portion 17 3 of a locking cam presents itself to the cam lug 171, the tail stock spindle may be moved yieldingly toward the end of the blank, and that after the blank has been secured, the locking portion of the locking cam engages the cam lug 171 and locks the tail stock spindle from further movement and holds it locked until the cam has made substantially a revolution, at which time a gouge has completed its action upon the blank and the back knife has finished the bobbin, whereupon the open portion 173 is again presented to the cam lug, allowing the tail stock spindle to be Withdrawn to release the finished bobbin.

The construction herein described and illustrated has been found to be a good, practical form of the invention. Its rigidity of 3 chine, the combination of a series of head structure, the axial alinement of the main driving and cam shafts, the arrangement of the gouge beds and their substantial support and operative connections, the means for controlling the gouges and back knife in the discharge of their functions, and other features are found well adapted as a means for carrying the invention into praceach of the gouges to act upon a bobbin tical eflect; but it is to be understood that the invention is not restricted to such details ment, and details, without departing from the actual invention which is definitely set forth by the claims.

What is claimed is 1. In an automatic bobbin turning machine, the combination of a series of bobbin blank holding and rotating devices arranged in an arc, a corresponding series of gouges disposed in a similar arc, means for causing blank a plurality of times to successively remove portions of the blank, and a back knife mounted to swing in an arc corresponding to that of the blank holding and rotating devices to enable said back knife to be positioned for action upon any one of the blanks after it has been rough turned by its gouge.

2. In an automobile turning machine, the combination of a series of blank holding and rotating devices, a series of bearings fixed to the machine frame and arranged to support said holding and rotating devices in a fixed circular arc, a corresponding series of gouge beds extending longitudinally of the blanks held by said devices and arranged in an arc concentric with that of the holding and rotating devices, gouges supported on and by said gouge beds, and means for causing each of said gouges to traverse longitudinally of its supporting bed a plurality of times to successively remove concentric portions of the blank and complete the roughing operation thereon, and a back knife movable into position opposite a blank after it is rough turned to finish the same.

3. In an automatic bobbin turning machine, the combination of a series of head and tail stock spindles arranged in circular arc, a corresponding series of gouge beds and gouges to act upon the bobbin blanks held by said series of spindles, means for driving the spindles, means for traversing the gouges longitudinally of the blanks held by said spindles, and a back knife arranged to swing about a center coincident with the center of the series of spindles to present the back knife to any one of the blanks carried by said spindles.

1. In an automatic bobbin turning maand tail stock spindles arranged in a circular are, a correspondmg serles of gouge beds and gouges to act upon bobbin blanks held by said series of spindles, means for driving the spindles, means for traversing the gouges longitudinally of the blanks held by said spindles, a back knife arranged to swing about a center coincident with the center of the series of spindles to present the back knife to any one of the blanks carried by said spindles, and means for swinging the back knife to a position opposite any one of the blanks.

5. In an automatic turning machine, the combination of a series of blank holding and rotating devices arranged in a circular arc, a corresponding series of gouges arranged in an arc concentric to that of said devices, means for causing the gouges to traverse longitudinally of the blanks a plurality of times that each gouge may complete the roughing operation on its opposed blank, and a finishing knife movable into positions successively opposite each blank to finish the same after it is rough turned.

6. In a bobbin turning machine of the character described, the combination of a series of head and tail stock spindles arranged in a circular arc, a corresponding series of gouge beds arranged in an arc con-1 centric with the series of spindles, gouges carried by said beds, means for moving the gouges longitudinally of said beds a plurality of times to remove successive portions of material from the blanks held by said spindles, means for turning the gouge beds each to a different position on each reciprocation of the gouges to cause the latter to act each at different distances from the axis of its blank and to place a gouge in inoperative position with respect to its blank after it has traversed the blank a plurality of times, and a back knife movable into position to act upon the blanks in succession when the adjacent gouge is moved to inoperative position. i

7. In an automatic turning machine, the combination of a series of blank holding and rotating means, a corresponding series of roughing gouges, said means and gouges being arranged in concentric circular series respectively in fixed relation that the same gouge may act throughout the turning op-., eration upon the same blank, means for moving the gouges longitudinally of the blanks a plurality of times to complete the; roughing operation of the blanks by each' gouge, means for moving a gouge awayfrom the blank when the gouge has finished: its last out, and a finishing knife movable bodily into position opposite a blank for acting on the blank while in the same position as when last treated by the gouge.

8. In an automatic turning machine, the combination of a series of blank holding and rotating devices arranged in a circular arc, a corresponding series of gouge beds having extensions at each end, bearings engaging said end extensions to support the gouge beds for rocking movement, a gouge slidably mounted on each gouge bed, means for moving the gouges longitudinally of the beds a plurality of times to enable each gouge to remove successive layers of material from the same blank and finish roughing it, a cam having independent cam sections, and independent connections between the cam sections and each gouge bed for independently swinging the gouge beds in their bearings to move the gouges toward the axis of the blank and to raise a gouge away from its blank when it has completed the last roughing cut.

9. In a bobbin turning machine, the combination of a series of blank holding and rotating devices arranged in a circular arc, a back knife mounted to swing about a center coincident with the center of saidiarc to present the knife to a blank held by said devices, a driving shaft, and means for driving the devices from said shaft.

10. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular arc, a back knife mounted to swing about a center coincident with the center of said are to present the knife to a blank between any of the head and tail stocks, means for advanc back knife carried by said trunnion frame,

meansfo-r presenting the back knife to a bobbin blank carried by any of saidhe'ad and tail stock spindles, andmeans for driving said spindles.

12. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular arc, a series of gouges for simultaneously acting upon a series of blanks held by said spindles, a back knife mounted to swing about a center coincident with the center of said circular arc to act upon any of the blanks held by saidspindles, means for advancing the back knife, and means for stopping the advance movement at a predetermined point.

13. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular are, a series of gouges for simultaneously acting upon said spindles, a

a series of blanks held by back knife mounted to swing about a center coincident with the center of said circular arc to act upon any ofthe blanks held by said spindles, meansfor advancing the back knife, and means for dropping the back knife directly away from the finished bobbin and withdrawing said knife 14. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in clrcularseries, a back knife, means for positioning the back knife opposite any blank held by said spindles, means for advancing the back knife when so positioned, and means for moving the back knife away from the finished bobbin when the back knife has finished its out.

l5. In a bobbin turning machine, the combination ofa series of head and tail stock spindles arranged in circular series, a back,

knife, means for positioning the back knife opposite any blank held by said spindles, means for advancing the back knife when so positioned, means for moving the back ios knife away from the finished bobbin when the back knife has finished its cut, and means insure proper position of the back knife during its advancing movement.

17. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular are, a' trun nion frame mounted to swing about a center coincident with the center of the circular arc, a back knife carried by said trunnion frame, means for advancing and withdraw ing the back knife, 'a guide to insure proper position of the back knife during its advanc-I ing movement, and means to swing the trun-. nion frame about its center'when theb'ack knife has completed its advance movement.

18. In a bobbin turning machine, the com-j bination of a series of head and tail stock spindles arranged in a circular arc, a trunnionframe mounted to swing about a center coincident with the center of the circular arc, a back knife carried by said trunnion frame, means for advancing and withdraw ing the back knife, and a series of guides, one for each of the head and tail stock spindles, to direct the knife in the desired ath as it moves forward. f

19. In a bobbin turning machine, the com-. bination of a series of head and tail stock spindles arranged in acircular arc, a-trunnion frame mounted to swing about a'center coincident with the center of the circular are,

a back knife carried by said trunnion frame, means for advancing and withdrawing the back knife, a guide to insure proper position of the back lmife during its advancing movement, and means for adjusting said guide.

20. In a bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular arc, a driving shaft for driving said spindles, a series of ouges for simultaneously acting on the blanks held by said spindles, a back knife, cam shafts in axial alinement with the drivin shaft, means actuated from one of said s afts for swin ing the back lmife about the center of sai arc, and means actu- ,-ated from the other cam shaft for advancing and withdrawing the back knife. 7

21. In a machine of the character de scribed, a series of head and tail stock spindles arranged in a circular arc, a trunnion .frame mounted to swing about the centerof said are, a back knife carrier mounted on sand trunnion frame, and means permlttmg a permanent adjustment of the knife with respect to said carrier that the same may be readily removed and replaced without re adjustment.

22. In an automatic bobbin turning machine, the combination of head and tail stock spindles, means for yieldingly engaging the tail stock spindle with the end of a blank, means for locking the tail stock spindle from continued yielding pressure upon the end of the blank during the turning operation, and means for operating the spindles.

23. In an automatic bobbin turning machine, the combination of head and tail stock spindles, means for yieldingly engaging the end of the tail stock spindle with a bobbin blank, means for locking the tail stock spindle from continued pressure upon the end I of the blank during the turning operation andfor unlocking thespindle at the completion of the turning operation, and means for operating the spindles 24. In an automatic bobbin turning machine, the combinationof a series of head and tail stock spindles, means for yieldingly engaging the spindles with a bobbin blank, and a locking cam for each of the tail stock spindles to relieve the pressure of the spindle upon the blank during the turning operation and to unlock the spindles as the blanks are successively finished.

25. In an automatic bobbin turning machine, the combination of a series of head and tail stock spindles arranged in a circular arc, acorrespcnding series of rocking gouge beds each having a gouge movable longitudinally thereof, gouge bed lifter arms for independently rocking each bed and its gouge, a cam for acting on said arms, and means for permanently determining the adjustment of the arms with respect to the beds that an arm may be removed and replaced and the relation of the arm and its cam be preserved.

26. In an automatic bobbin turning machine, the combination of head and tail stock spindles, a rocking gouge bed, a gouge carriedby said bed, a gouge bed. lifter arm, means for detachably connecting the lifter arm to the rocking gouge bed, and means undisturbed by removal of the lifter arm for permanently determining the position of the lifter arm with respect to the rocking gouge bed. i i

27. In an automatic turning machine, the combination of a series of blank holding and rotating devices arranged in the arc of a circles less than the entire circumference thereof, a corresponding series of gouges similarly arranged, a cam, and plural means disposed about the entire circumference of the cam and each connected separately to one gouge to control themovement of the-same in a direction toward the blank.

28. In a machine for turning bobbins, the combination of a series of head and tail stock spindles arranged in a circular are, a like of which is the center of the said circular are, a trunnion frame mounted to swing about the center of said arcs, a back knife carried by the trunnion frame, means for causing the back knife to act upon a bobbin blank after it has been treated a plural number of times by a gouge, and means for freeing the bobbin from its head and tail stock spindles after it has been finished by the back knife. s

29. In a bobbin turning machine, the com bination of a trunnion frame, a knife slide or carrier mounted thereon, aback knife bracket carrying abackknife, a fixed part on the knife bracket to interlock with a complemental part on the knife slide or carriage, and adjustable wedging means between another part of the knife bracket and slide or carriage to detachably connect the two.

30. In a bobbin turning machine, the combination of a series of bobbin blank holding and rotating devices, a corresponding series of gouge beds and gouges, means for moving the gouges longitudinally a plural number of times to make successive cuts each on its own blank, means for independently moving each gouge toward or from the axis of its blank on each successive cut, a single back knife, and means for moving the back knife successively into position opposite each blank to finish it after it has been treated a plural number of times by its gouge.

31. In an automatic bobbin turning machine, the combination of a series of bobbin blank holding and rotating devices, a corresponding series of rocking gouge beds each carrying a gouge, and a cam having different cam sections each acting at different times independently upon each of the gouge beds to determine the position of its gouge in making a cut.

32. In an automatic bobbin turning machine, the combination of a series of bobbin blank holding and rotating devices, a corresponding series of rocking gouge beds each carrying a gouge, a cam having different cam sections each acting at different times independently upon each of the gouge beds to determine the position of its gouge in making a cut, and means for detachably connecting the different cam sections in operative position.

33. In an automatic bobbin turning machine, the combination of a series of bobbin blank holding and rotating devices, a corresponding series of rocking gouge beds each carrying a gouge, a cam havlng cam sections for determining the depth of cut for each gouge, and one of said sections acting to raise one gouge from the blank after it has been cut a plural number of times by its gouge and permit the other gouges of the series to remain in operative relation with their respective blanks.

34. In a bobbin turning machine, the combination of a series of bobbin blank rotating devices arranged in'the segment of a circle, a corresponding series of rocking gouge beds arranged in a similar are, a cam having cam sections about its entire circular periphery for controlling the rocking position of the gouge beds, means arranged regularly about the cam, and an individual connection between each means and each gouge bed for positioning the latter.

35. In a bobbin turning machine, the combination .ofbobbin blank rotating devices, a rocking gouge bed, a gouge carried by said bed, a gouge bed lifter arm, means for detachably connecting the lifter arm and gouge bed, a pin or abutment movable with the gouge bed as it is rocked, and an adjusting device connected to the lifter arm to be set in position to contact with the pin or abutment when the parts are properly assembled.

36. In a turning machine, the combination of a series of blank holding and rotating devices arranged in the are of a circle, a corresponding series of gouges arranged in an arc concentric to that of said devices, a back or finishing knife mounted for movement into operative relation successively with the blanks held by said devices, means for advancing said knife to perform its cutting action, and means for moving the said knife radially away from the finished blank at the conclusion of the cutting operation and then withdrawing said back or finishing knife. a

37 In a bobbin turning machine, the combination of a circular series of bobbin blank rotating devices, a corresponding series of hollow rocking gouge beds each having an end extension, a gouge mounted for longitudinal movement on each rocking bed, a rod extending into each hollow rocking gouge bed and connected to the gouge, a cam, and connections between the rods and cam for moving the gouges on the gouge beds.

38. In a machine for turning bobbins, the combination of bobbin blank rotating devices, a rocking gouge bed having an extension at each end, a gouge on the bed, a spring connected with one end extension normally acting to turn the gouge bed to position the gouge for the cutting operation, a cam, and connections between the cam and the other end extension for turn ing the gouge bed in opposition to the spring.

39. In an automatic turning machine, the

combination of aseries of blank holding and own blank, a back or finishing knife mount ed to be moved successively opposite the blanks of the series, and means for moving and holding the adjacent roughing knife away from the blank as the back or finish ing knife operates on the blank.

40. In a machine for turning bobbins, the combination of bobbin blank rotating devices arranged in circular series, a trun nion frame mounted to swing about the cen: ter of said are, a back knife mounted on the trunnion frame to be swung into position to act on anyone of the bobbin blanks of the series, and means for detachably con Copies of this patent may be obtained for five cents each, by addressing the Washington, D. '0.

necting the back knife to the trunnion frame.

41. In a machine forturning bobbins, the combination of bobbin blank rotating de- Vices arranged in circular series, a trunnion frame mounted to swing about the center of said are, a back knife block carrying a back knife, a back knife carrier mounted on the trunnion frame and carrying said block, and means permitting the carrier and its attached back knife block and back knife to be readily removed and replaced on the trunnion frame.

' In testimony whereof, I have signed my name to this specification, in the presence of two subscribing witnesses.

WILLIAJVI C. FARNUM.

Witnesses:

MARY C. HALL, CHARLES F. BAKER.

Commissioner of Patents, 

